An amnesiac soul is forced to travel to the HP world, and his goal is to rationalize the wizard. Similar to how the protagonist spends his life in different HP planes and changes the relationship between humans and wizards, the protagonist has no cp.
The protagonist will control different bodies at different times, including but not limited to humans, mermaids, cats, dogs, centaurs, etc.
The first world, Dudley Dursley, has the CP of Harry x original character (male)
Purpose: It is urgent to rationalize magic